The term "big" refers to something that has a large size, volume, or extent. It can describe physical objects, such as a building or a tree, as well as abstract concepts like ideas or emotions. In general, "big" indicates a comparison to other items, suggesting that the subject is larger than average.
In various contexts, "big" can also imply importance or significance. For example, a decision may be considered big if it has major consequences. Similarly, a celebrity might be described as big in the media if they have a substantial influence or following.